RPM Air-Gap Dual Quad Big Block Chevy Intake Manifold

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Edelbrock RPM Air-Gap Dual Quad Manifold for Chevrolet 396-502 Big-Block V8 with large Oval Port Heads
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Edelbrock part #7520 Air-Gap Dual-Quad-O intake manifold is designed for street 396-502 c.i.d. Chevy V8's with 1975 & earlier oval port heads. This intake stands 7/8" taller than the low-profile C-66-O dual-quad intake and offer performance improvements in the 1500-6500 rpm range. The large runners feature our unique Air-Gap design that separates the runners from the hot engine valley for a cooler, denser charge.

Documents & Installation Notes


Availability Available
Application Application Specific
UPC 00085347075201
Series Dual-Quad/Multi Carb
Gasket Or Seal Included No
Vehicle Model Chevrolet
Availability Note Available to Order
Warranty 12 Months
Ec Basic Operating Rpm Range 1500-6500 RPM
Emissions Code
Hazardous Materials Warning WARNING: This product can expose you to Lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit
Installation Notes
  • Neither H.E.I. or mechanical tach drive distributors will fit; Recommended intake gasket: Edelbrock #7203.; Manifold height: A-4.81", B-5.56"; Carb pad height: 5.19"; Carb recommendations: Edelbrock AVS2 Series #1903 and #1904, 500 cfm.; Port exit dimensions: 1.60" x 1.93"; Use RTV sealant to properly seal end seals, such as Edelbrock High Temp Silicone sealant #1076, DO NOT USE END SEALS GASKETS.; Hardened washers Must be used with intake bolts to ensure proper torque and prevent galling of the aluminum.
Center Maximum Height 5.190 in
CNC Ported No
Finish Satin
Front Maximum Height 4.810 in
Material Aluminum
Rear Maximum Height 5.560 in
Single Or Dual Plane Type Dual